[InstCombine,PhaseOrder] Add additional tests with align assumptions.

Author: fhahn

llvm/test/Transforms/InstCombine/assume-align.ll

@@ -171,3 +171,85 @@ define ptr @dont_fold_assume_align_zero_of_loaded_pointer_into_align_metadata(pt
   call void @llvm.assume(i1 true) [ "align"(ptr %p2, i64 0) ]
   ret ptr %p2
 }
+
+define ptr @redundant_assume_align_1(ptr %p) {
+; CHECK-LABEL: @redundant_assume_align_1(
+; CHECK-NEXT:    [[P2:%.*]] = load ptr, ptr [[P:%.*]], align 8
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P2]], i32 1) ]
+; CHECK-NEXT:    call void @foo(ptr [[P2]])
+; CHECK-NEXT:    ret ptr [[P2]]
+;
+  %p2 = load ptr, ptr %p
+  call void @llvm.assume(i1 true) [ "align"(ptr %p2, i32 1) ]
+  call void @foo(ptr %p2)
+  ret ptr %p2
+}
+
+
+define ptr @redundant_assume_align_8_via_align_metadata(ptr %p) {
+; CHECK-LABEL: @redundant_assume_align_8_via_align_metadata(
+; CHECK-NEXT:    [[P2:%.*]] = load ptr, ptr [[P:%.*]], align 8, !align [[META0:![0-9]+]]
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P2]], i32 8) ]
+; CHECK-NEXT:    call void @foo(ptr [[P2]])
+; CHECK-NEXT:    ret ptr [[P2]]
+;
+  %p2 = load ptr, ptr %p, !align !{i64 8}
+  call void @llvm.assume(i1 true) [ "align"(ptr %p2, i32 8) ]
+  call void @foo(ptr %p2)
+  ret ptr %p2
+}
+
+define ptr @assume_align_16_via_align_metadata(ptr %p) {
+; CHECK-LABEL: @assume_align_16_via_align_metadata(
+; CHECK-NEXT:    [[P2:%.*]] = load ptr, ptr [[P:%.*]], align 8, !align [[META0]]
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P2]], i32 16) ]
+; CHECK-NEXT:    call void @foo(ptr [[P2]])
+; CHECK-NEXT:    ret ptr [[P2]]
+;
+  %p2 = load ptr, ptr %p, !align !{i64 8}
+  call void @llvm.assume(i1 true) [ "align"(ptr %p2, i32 16) ]
+  call void @foo(ptr %p2)
+  ret ptr %p2
+}
+
+define ptr @redundant_assume_align_8_via_align_attribute(ptr align 8 %p) {
+; CHECK-LABEL: @redundant_assume_align_8_via_align_attribute(
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P:%.*]], i32 8) ]
+; CHECK-NEXT:    call void @foo(ptr [[P]])
+; CHECK-NEXT:    ret ptr [[P]]
+;
+  call void @llvm.assume(i1 true) [ "align"(ptr %p, i32 8) ]
+  call void @foo(ptr %p)
+  ret ptr %p
+}
+
+define ptr @assume_align_16_via_align_attribute(ptr align 8 %p) {
+; CHECK-LABEL: @assume_align_16_via_align_attribute(
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P:%.*]], i32 16) ]
+; CHECK-NEXT:    call void @foo(ptr [[P]])
+; CHECK-NEXT:    ret ptr [[P]]
+;
+  call void @llvm.assume(i1 true) [ "align"(ptr %p, i32 16) ]
+  call void @foo(ptr %p)
+  ret ptr %p
+}
+
+define ptr @redundant_assume_align_8_via_asume(ptr %p) {
+; CHECK-LABEL: @redundant_assume_align_8_via_asume(
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P:%.*]], i32 16) ]
+; CHECK-NEXT:    call void @foo(ptr [[P]])
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i32 8) ]
+; CHECK-NEXT:    call void @foo(ptr [[P]])
+; CHECK-NEXT:    ret ptr [[P]]
+;
+  call void @llvm.assume(i1 true) [ "align"(ptr %p, i32 16) ]
+  call void @foo(ptr %p)
+  call void @llvm.assume(i1 true) [ "align"(ptr %p, i32 8) ]
+  call void @foo(ptr %p)
+  ret ptr %p
+}
+
+declare void @foo(ptr)
+;.
+; CHECK: [[META0]] = !{i64 8}
+;.

llvm/test/Transforms/PhaseOrdering/AArch64/infer-align-from-assumption.ll

@@ -0,0 +1,120 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -passes='default<O3>' -S %s | FileCheck %s
+
+target triple = "arm64-apple-macosx"
+
+declare void @llvm.assume(i1 noundef)
+
+define i32 @earlycse_entry(ptr %p) {
+; CHECK-LABEL: define i32 @earlycse_entry(
+; CHECK-SAME: ptr nocapture [[P:%.*]]) local_unnamed_addr {
+; CHECK-NEXT:    [[L_I:%.*]] = load ptr, ptr [[P]], align 8
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[L_I]], i64 4) ]
+; CHECK-NEXT:    [[L_ASSUME_ALIGNED_I_I:%.*]] = load i32, ptr [[L_I]], align 4
+; CHECK-NEXT:    [[R_I_I:%.*]] = tail call i32 @swap(i32 [[L_ASSUME_ALIGNED_I_I]])
+; CHECK-NEXT:    [[L_2_I:%.*]] = load ptr, ptr [[P]], align 8
+; CHECK-NEXT:    [[GEP_I:%.*]] = getelementptr i8, ptr [[L_2_I]], i64 4
+; CHECK-NEXT:    store ptr [[GEP_I]], ptr [[P]], align 8
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[GEP_I]], i64 4) ]
+; CHECK-NEXT:    [[L_ASSUME_ALIGNED_I_I2:%.*]] = load i32, ptr [[GEP_I]], align 4
+; CHECK-NEXT:    [[R_I_I3:%.*]] = tail call i32 @swap(i32 [[L_ASSUME_ALIGNED_I_I2]])
+; CHECK-NEXT:    [[L_2_I4:%.*]] = load ptr, ptr [[P]], align 8
+; CHECK-NEXT:    [[GEP_I5:%.*]] = getelementptr i8, ptr [[L_2_I4]], i64 4
+; CHECK-NEXT:    store ptr [[GEP_I5]], ptr [[P]], align 8
+; CHECK-NEXT:    ret i32 [[R_I_I3]]
+;
+  %r.1 = call i32 @earlycse_fn1(ptr %p)
+  %r.2 = call i32 @earlycse_fn1(ptr %p)
+  ret i32 %r.2
+}
+
+define i32 @earlycse_fn1(ptr %p) {
+; CHECK-LABEL: define i32 @earlycse_fn1(
+; CHECK-SAME: ptr nocapture [[P:%.*]]) local_unnamed_addr {
+; CHECK-NEXT:    [[L:%.*]] = load ptr, ptr [[P]], align 8
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[L]], i64 4) ]
+; CHECK-NEXT:    [[L_ASSUME_ALIGNED_I:%.*]] = load i32, ptr [[L]], align 4
+; CHECK-NEXT:    [[R_I:%.*]] = tail call i32 @swap(i32 [[L_ASSUME_ALIGNED_I]])
+; CHECK-NEXT:    [[L_2:%.*]] = load ptr, ptr [[P]], align 8
+; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[L_2]], i64 4
+; CHECK-NEXT:    store ptr [[GEP]], ptr [[P]], align 8
+; CHECK-NEXT:    ret i32 [[R_I]]
+;
+  %l = load ptr, ptr %p, align 8
+  %r = call i32 @load_assume_aligned(ptr %l)
+  %l.2 = load ptr, ptr %p, align 8
+  %gep = getelementptr i8, ptr %l.2, i64 4
+  store ptr %gep, ptr %p, align 8
+  ret i32 %r
+}
+
+define i32 @load_assume_aligned(ptr %p) {
+; CHECK-LABEL: define i32 @load_assume_aligned(
+; CHECK-SAME: ptr [[P:%.*]]) local_unnamed_addr {
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 4) ]
+; CHECK-NEXT:    [[DOT0_COPYLOAD:%.*]] = load i32, ptr [[P]], align 4
+; CHECK-NEXT:    [[TMP2:%.*]] = tail call i32 @swap(i32 [[DOT0_COPYLOAD]])
+; CHECK-NEXT:    ret i32 [[TMP2]]
+;
+  call void @llvm.assume(i1 true) [ "align"(ptr %p, i64 4) ]
+  %l.assume_aligned = load i32, ptr %p, align 1
+  %r = call i32 @swap(i32 %l.assume_aligned)
+  ret i32 %r
+}
+
+declare i32 @swap(i32)
+
+define void @sroa_align_entry(ptr %p) {
+; CHECK-LABEL: define void @sroa_align_entry(
+; CHECK-SAME: ptr [[P:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] {
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
+; CHECK-NEXT:    [[DOT0_COPYLOAD_I_I_I:%.*]] = load i64, ptr [[P]], align 8
+; CHECK-NEXT:    [[TMP2:%.*]] = inttoptr i64 [[DOT0_COPYLOAD_I_I_I]] to ptr
+; CHECK-NEXT:    store i32 0, ptr [[TMP2]], align 4
+; CHECK-NEXT:    ret void
+;
+  %a = alloca ptr, align 8
+  store ptr %p, ptr %a, align 8
+  %r = call ptr @sroa_fn1(ptr %a)
+  store i32 0, ptr %r, align 4
+  ret void
+}
+
+define ptr @sroa_fn1(ptr %p) {
+; CHECK-LABEL: define ptr @sroa_fn1(
+; CHECK-SAME: ptr nocapture readonly [[P:%.*]]) local_unnamed_addr #[[ATTR2:[0-9]+]] {
+; CHECK-NEXT:    [[L:%.*]] = load ptr, ptr [[P]], align 8
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[L]], i64 8) ]
+; CHECK-NEXT:    [[L_FN3_I_I:%.*]] = load i64, ptr [[L]], align 8
+; CHECK-NEXT:    [[I_I:%.*]] = inttoptr i64 [[L_FN3_I_I]] to ptr
+; CHECK-NEXT:    ret ptr [[I_I]]
+;
+  %l = load ptr, ptr %p, align 8
+  %r = call ptr @sroa_fn2(ptr %l)
+  ret ptr %r
+}
+
+define ptr @sroa_fn2(ptr %p) {
+; CHECK-LABEL: define ptr @sroa_fn2(
+; CHECK-SAME: ptr [[P:%.*]]) local_unnamed_addr #[[ATTR3:[0-9]+]] {
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
+; CHECK-NEXT:    [[DOT0_COPYLOAD_I_I:%.*]] = load i64, ptr [[P]], align 8
+; CHECK-NEXT:    [[TMP3:%.*]] = inttoptr i64 [[DOT0_COPYLOAD_I_I]] to ptr
+; CHECK-NEXT:    ret ptr [[TMP3]]
+;
+  %r = call i64 @sroa_fn3(ptr %p)
+  %i = inttoptr i64 %r to ptr
+  ret ptr %i
+}
+
+define i64 @sroa_fn3(ptr %0) {
+; CHECK-LABEL: define i64 @sroa_fn3(
+; CHECK-SAME: ptr [[TMP0:%.*]]) local_unnamed_addr #[[ATTR3]] {
+; CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[TMP0]], i64 8) ]
+; CHECK-NEXT:    [[DOT0_COPYLOAD_I:%.*]] = load i64, ptr [[TMP0]], align 8
+; CHECK-NEXT:    ret i64 [[DOT0_COPYLOAD_I]]
+;
+  call void @llvm.assume(i1 true) [ "align"(ptr %0, i64 8) ]
+  %l.fn3 = load i64, ptr %0, align 1
+  ret i64 %l.fn3
+}